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Relay circuitsPosted by Will Stevens Sun, February 28, 2016 23:55:50This video shows a counter circuit that I hope will form the basis of a simple punched tape driven system for controlling the speed and direction of a pair of stepper motors.

The punched tape will have a simple mask for each motor for selecting the speed (1/1, 1/2, 1/3 or 1/4 of the clock rate) and direction. A third mask will be used for specifying the count of the modulo 12 counter on which the punched tape should advance to the next position.